Malicious PDF — malware analysis report

Static analysis result for SHA-256 3252837964db1006…

MALICIOUS

PDF

34.7 KB Created: 2021-07-07 17:00:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 00e87b3562d7a3de8e2eb50686bec4c5 SHA-1: bc62a6d8deb7ba49cb608bd4bd5f5a9f1fce6960 SHA-256: 3252837964db1006a07a00b74e90a058e42e54778ca1a803d162d8f7808d1332
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary URL http://netcdn.tw/app/431946152/robuxglobalcom-game-hack is identified as a malicious redirector, likely leading to further malicious content or downloads. The presence of a download button lure and the ML classifier's high confidence score further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/431946152/robuxglobalcom-game-hack In PDF document text
    • http://fobh.net/userfiles/files/roblox-robux-hack-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/como-hackear-cuentas-de-roblox-xonnek_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/https-wwwrobloxcom-games-2021202196-freeubersummerrewards-go-play-now_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/robux-hacks-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/10-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-hacked-arcadeprehacks_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/script-create-platforms-under-the-character-roblox-hack_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-robux-hack-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/village-coin_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3289 22064 bytes
SHA-256: fe5991383af70ddd5c34a6067109a5f193cd09e189e954d51bf059647897becf
font_01_sfnt_off00006346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6346 18884 bytes
SHA-256: 77bdee58b98e4b81ad8b422e6c8a2d119f103232b777f7197d72db293d7d4d98

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